/*
* Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package java.awt;
/**
* The {@code GridBagLayoutInfo} is an utility class for
* {@code GridBagLayout} layout manager.
* It stores align, size and baseline parameters for every component within a container.
* <p>
* @see java.awt.GridBagLayout
* @see java.awt.GridBagConstraints
* @since 1.6
*/
public class GridBagLayoutInfo implements java.io.Serializable {
/*
* serialVersionUID
*/
private static final long serialVersionUID = -4899416460737170217L;
int width, height; /* number of cells: horizontal and vertical */
int startx, starty; /* starting point for layout */
int minWidth[]; /* largest minWidth in each column */
int minHeight[]; /* largest minHeight in each row */
double weightX[]; /* largest weight in each column */
double weightY[]; /* largest weight in each row */
boolean hasBaseline; /* Whether or not baseline layout has been
* requested and one of the components
* has a valid baseline. */
// These are only valid if hasBaseline is true and are indexed by
// row.
short baselineType[]; /* The type of baseline for a particular
* row. A mix of the BaselineResizeBehavior
* constants (1 << ordinal()) */
int maxAscent[]; /* Max ascent (baseline). */
int maxDescent[]; /* Max descent (height - baseline) */
/**
* Creates an instance of GridBagLayoutInfo representing {@code GridBagLayout}
* grid cells with it's own parameters.
* @param width the columns
* @param height the rows
* @since 6.0
*/
GridBagLayoutInfo(int width, int height) {
this.width = width;
this.height = height;
}
/**
* Returns true if the specified row has any component aligned on the
* baseline with a baseline resize behavior of CONSTANT_DESCENT.
*/
boolean hasConstantDescent(int row) {
return ((baselineType[row] & (1 << Component.BaselineResizeBehavior.
CONSTANT_DESCENT.ordinal())) != 0);
}
/**
* Returns true if there is a baseline for the specified row.
*/
boolean hasBaseline(int row) {
return (hasBaseline && baselineType[row] != 0);
}
}